<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>登录3</title>
		<style>
			* {
				margin: 0;
				padding: 0;
				box-sizing: border-box;
			}

			body {
				height: 100vh;
				background-color: aquamarine;
				background: url("https://images.pexels.com/photos/936722/pexels-photo-936722.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1") no-repeat;
				background-size: cover;
			}

			.Box {
				position: fixed;
				top: 50%;
				left: 50%;
				transform: translate(-50%, -50%);
				width: 550px;
				height: 330px;
				display: flex;
			}

			.left {
				position: relative;
				width: 50%;
				height: 100%;
				background-color: rgba(57, 99, 134, 0.75);
			}

			.right {
				position: relative;
				width: 50%;
				height: 100%;
				background-color: rgba(255, 255, 255, 1);
			}

			.centerBox {
				position: absolute;
				top: 50%;
				left: 50%;
				transform: translate(-50%, -50%);
				width: 80%;
				text-align: center;
			}

			.left img {
				width: 50px;
				height: 50px;
				margin-bottom: 5px;
			}

			.left p {
				font-size: 14px;
				color: #fff;
			}

			.left h4 {
				font-size: 18px;
				color: #fff;
				margin-bottom: 10px;
			}

			.right form {
				position: absolute;
				top: 50%;
				left: 50%;
				transform: translate(-50%, -50%);
				width: 80%;
				text-align: center;
			}

			h3 {
				margin-bottom: 20px;
			}

			input {
				width: 100%;
				height: 30px;
				border: 1px solid #767676;
				background-color: transparent;
				padding-left: 10px;
				font-size: 12px;
				color: #000000;
				margin-bottom: 15px;
				outline: none;
			}

			.loginBtn {
				width: 100%;
				height: 35px;
				line-height: 32px;
				text-align: center;
				font-size: 15px;
				color: #fff;
				border-radius: 6px;
				background: rgb(57, 99, 134);
				outline: none;
				border: none;
				margin-top: 10px;
			}

			.no {
				cursor: pointer;
				margin-top: 30px;
				text-align: center;
				font-size: 12px;
				color: #828282;
			}
		</style>
	</head>
	<body>
		<div class="Box">
			<div class="left">
				<div class="centerBox">
					<img src="https://img0.baidu.com/it/u=2804005887,994501744&fm=253&fmt=auto&app=138&f=JPEG?w=200&h=200"
						alt="">
					<h4>某某后台管理系统</h4>
					<p>This is a description</p>
				</div>
			</div>
			<div class="right">
				<form action="">
					<h3>欢迎登录</h3>
					<input type="text" placeholder="请输入账号" required>
					<input type="password" placeholder="请输入密码" required>
					<input type="submit" class="loginBtn" value="登录"></button>
					<p class="no">没有账号？立即注册</p>
				</form>

			</div>
		</div>
	</body>
</html>